Dahdidahdit — The Morse Trainer - F-Droid Main Repository

Dahdidahdit — The Morse Trainer

An Actual Morse Code Trainer — Not Just A Morse Code Generator

AppID:	com.paddlesandbugs.dahdidahdit
Author:	Unknown
License:	GPL-3.0-only
Donation:	LiberaPay
InRepoSince:	2024-10-25
LastRepoUpdate:	2025-05-11
LastAppUpdate:	Unknown
LastVersion:	1.15.0
Categories:	Science & Education
APK source:	Github
Google Play:	Check if it's there

Introduction
Ham radio ops who like QRP will sooner or later want to learn Morse code so they can communicate using CW. This app teaches amateur radio enthusiasts how Morse code works and helps them build their speed.

Custom-Tailored Lessons
You set your current level of proficiency and what you aim for (e.g. all letters with 20 words per minute). Dahdidahdit guides you from where you are to where you want to be — It teaches you new letters when you are ready and increases your speed when you seem bored.

Requirements
The only things you need (other than a phone and the app) are a sheet of paper and a pen.

Usage
When you start the session, Dahdidahdit plays Morse code letters so you can determine which speed you are comfortable with. You jot down the letters you recognized. When the session ends, Dahdidahdit shows you what it sent and you compare notes. Then you tap the button that shows the number of mistakes.

Automated Curriculum
When you complete enough practice sessions with only a few mistakes, Dahdidahdit starts the next lesson, by introducing a new letter or by increasing the speed.

Additional Features

Learning Q-codes

Sending practice using either an on-screen or an actual paddle connected by USB

Morse QSOs via internet with Morserino or Dahdidahdit users

Game: Morse Tennis

WhatsNew:

• Allow to use external mouse as paddle (#25)
• Upgrade to install on Android 15

Hint: This app is available in both, F-Droid Main and IzzyOnDroid repos.

Download Source Issues

While you can download the APKs here directly, you should preferably use an F-Droid client so the app stays up-to-date on your device.

Packages

Version 1.15.0 (2025-05-11)

Android Versions:

Target: 15.0
MinVer: 7.0
ABIs: arm64-v8a, armeabi-v7a, x86, x86_64

Permissions:

Malware-Check:Passed

26 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AndroidX Activity (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
AppCompat (Utility)
support newer Android features on older Android versions.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Concurrent (Utility)
AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Drawerlayout (UI Component)
AndroidX library to implement a Material Design drawer widget.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Loader (Utility)
library to load data for your UI that survives configuration changes.
Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
Room (Utility)
a persistence library that provides an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Android Activity Saved State (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
AndroidX Test (Development Framework)
an extensive framework for testing Android apps.
Transition (UI Component)
animates motion in the UI with starting and ending layouts.
Vectordrawable (UI Component)
AndroidX library to render vector graphics.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Viewpager (UI Component)
AndroidX library to display Views or Fragments in a swipeable format.
AndroidX Widget ViewPager2 (UI Component)
replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
Google Material Design (Utility)
library to help with material design guidelines.

Payment Modules:

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library to help with material design guidelines.

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library to help with material design guidelines.

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Version 1.14.1 (2025-04-22)

Android Versions:

Target: 14.0
MinVer: 7.0
ABIs: arm64-v8a, armeabi-v7a, x86, x86_64

Permissions:

Malware-Check:Passed

27 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AndroidX Activity (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
AppCompat (Utility)
support newer Android features on older Android versions.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Concurrent (Utility)
AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Drawerlayout (UI Component)
AndroidX library to implement a Material Design drawer widget.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Loader (Utility)
library to load data for your UI that survives configuration changes.
Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
Room (Utility)
a persistence library that provides an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Android Activity Saved State (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
AndroidX Test (Development Framework)
an extensive framework for testing Android apps.
Transition (UI Component)
animates motion in the UI with starting and ending layouts.
Vectordrawable (UI Component)
AndroidX library to render vector graphics.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Viewpager (UI Component)
AndroidX library to display Views or Fragments in a swipeable format.
AndroidX Widget ViewPager2 (UI Component)
replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
Google Material Design (Utility)
library to help with material design guidelines.
kotlinx.coroutines (Utility)
library support for Kotlin coroutines.

Payment Modules:

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Version 1.14.0 (2025-03-26)

Android Versions:

Target: 14.0
MinVer: 7.0
ABIs: arm64-v8a, armeabi-v7a, x86, x86_64

Permissions:

Malware-Check:Passed

27 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AndroidX Activity (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
AppCompat (Utility)
support newer Android features on older Android versions.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Concurrent (Utility)
AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Drawerlayout (UI Component)
AndroidX library to implement a Material Design drawer widget.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Loader (Utility)
library to load data for your UI that survives configuration changes.
Preference (Utility)
a library to build interactive settings screens without needing to interact with device storage or manage the UI.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
Room (Utility)
a persistence library that provides an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Android Activity Saved State (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
AndroidX Test (Development Framework)
an extensive framework for testing Android apps.
Transition (UI Component)
animates motion in the UI with starting and ending layouts.
Vectordrawable (UI Component)
AndroidX library to render vector graphics.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Viewpager (UI Component)
AndroidX library to display Views or Fragments in a swipeable format.
AndroidX Widget ViewPager2 (UI Component)
replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
Google Material Design (Utility)
library to help with material design guidelines.
kotlinx.coroutines (Utility)
library support for Kotlin coroutines.

Payment Modules:

None found
library support for Kotlin coroutines.

Ads & Analytics:

None found
library support for Kotlin coroutines.

Download (2.9 M)